<?php
/**
 * ---------------------------------------------------------------------
 * GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2015-2018 Teclib' and contributors.
 *
 * http://glpi-project.org
 *
 * based on GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2003-2014 by the INDEPNET Development Team.
 *
 * ---------------------------------------------------------------------
 *
 * LICENSE
 *
 * This file is part of GLPI.
 *
 * GLPI is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GLPI is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GLPI. If not, see <http://www.gnu.org/licenses/>.
 * ---------------------------------------------------------------------
 */

if (!defined('GLPI_ROOT')) {
   die("Sorry. You can't access this file directly");
}

class RuleDictionnaryPrinterCollection extends RuleCollection {
   // From RuleCollection

   public $stop_on_first_match = true;
   public $can_replay_rules    = true;
   public $menu_type           = 'dictionnary';
   public $menu_option         = 'printer';

   static $rightname           = 'rule_dictionnary_printer';

   /**
    * @see RuleCollection::getTitle()
   **/
   function getTitle() {
      return __('Dictionnary of printers');
   }


   /**
    * @see RuleCollection::cleanTestOutputCriterias()
   **/
   function cleanTestOutputCriterias(array $output) {

      //If output array contains keys begining with _ : drop it
      foreach ($output as $criteria => $value) {
         if (($criteria[0] == '_') && ($criteria != '_ignore_import')) {
            unset ($output[$criteria]);
         }
      }
      return $output;
   }


   /**
    * @see RuleCollection::replayRulesOnExistingDB()
   **/
   function replayRulesOnExistingDB($offset = 0, $maxtime = 0, $items = [], $params = []) {
      global $DB;

      if (isCommandLine()) {
         printf(__('Replay rules on existing database started on %s')."\n", date("r"));
      }
      $nb = 0;
      $i  = $offset;

      //Select all the differents software
      $criteria = [
         'SELECT' => [
            'glpi_printers.name',
            'glpi_manufacturers.name AS manufacturer',
            'glpi_printers.manufacturers_id AS manufacturers_id',
            'glpi_printers.comment AS comment'
         ],
         'DISTINCT'  => true,
         'FROM'      => 'glpi_printers',
         'LEFT JOIN' => [
            'glpi_manufacturers' => [
               'ON'  => [
                  'glpi_manufacturers' => 'id',
                  'glpi_printers'      => 'manufacturers_id'
               ]
            ]
         ],
         'WHERE'     => [
            // Do not replay on trashbin and templates
            'glpi_printers.is_deleted'    => 0,
            'glpi_printers.is_template'   => 0
         ]
      ];

      if ($offset) {
         $criteria['START'] = (int)$offset;
         $criteria['LIMIT'] = 999999999;
      }

      $iterator = $DB->request($criteria);
      $nb   = count($iterator) + $offset;
      $step = (($nb > 1000) ? 50 : (($nb > 20) ? floor($nb / 20) : 1));

      while ($input = $iterator->next()) {
         if (!($i % $step)) {
            if (isCommandLine()) {
               //TRANS: %1$s is a date, %2$s is a row, %3$s is total row, %4$s is memory
               printf(__('%1$s - replay rules on existing database: %2$s/%3$s (%4$s Mio)')."\n",
                      date("H:i:s"), $i, $nb, round(memory_get_usage() / (1024 * 1024), 2));
            } else {
               Html::changeProgressBarPosition($i, $nb, "$i / $nb");
            }
         }

         //Replay printer dictionnary rules
         $res_rule = $this->processAllRules($input, [], []);

         foreach (['manufacturer', 'is_global', 'name'] as $attr) {
            if (isset($res_rule[$attr]) && ($res_rule[$attr] == '')) {
               unset($res_rule[$attr]);
            }
         }

         //If the software's name or version has changed
         if (self::somethingHasChanged($res_rule, $input)) {

            $IDs = [];
            //Find all the printers in the database with the same name and manufacturer
            $print_iterator = $DB->request([
               'SELECT' => 'id',
               'FROM'   => 'glpi_printers',
               'WHERE'  => [
                  'name'               => $input['name'],
                  'manufacturers_id'   => $input['manufacturers_id']
               ]
            ]);

            if (count($iterator)) {
               //Store all the printer's IDs in an array
               while ($result = $iterator->next()) {
                  $IDs[] = $result["id"];
               }
               //Replay dictionnary on all the printers
               $this->replayDictionnaryOnPrintersByID($IDs, $res_rule);
            }
         }
         $i++;

         if ($maxtime) {
            $crt = explode(" ", microtime());
            if ($crt[0] + $crt[1] > $maxtime) {
               break;
            }
         }
      }

      if (isCommandLine()) {
         printf(__('Replay rules on existing database: %1$s/%2$s')."\n", $i, $nb);
      } else {
         Html::changeProgressBarPosition($i, $nb, "$i / $nb");
      }

      if (isCommandLine()) {
         printf(__('Replay rules on existing database ended on %s')."\n", date("r"));
      }

      return (($i == $nb) ? -1 : $i);
   }


   /**
    * @param $res_rule  array
    * @param $input     array
   **/
   static function somethingHasChanged(array $res_rule, array $input) {

      if ((isset($res_rule["name"]) && ($res_rule["name"] != $input["name"]))
          || (isset($res_rule["manufacturer"]) && ($res_rule["manufacturer"] != ''))
          || (isset($res_rule['is_global']) && ($res_rule['is_global'] != ''))) {
         return true;
      }
      return false;
   }


   /**
    * Replay dictionnary on several printers
    *
    * @param $IDs       array of printers IDs to replay
    * @param $res_rule  array of rule results
    *
    * @return Query result handler
   **/
   function replayDictionnaryOnPrintersByID(array $IDs, $res_rule = []) {
      global $DB;

      $new_printers  = [];
      $delete_ids    = [];

      $iterator = $DB->request([
         'SELECT'    => [
            'glpi_printers.id',
            'glpi_printers.name',
            'glpi_printers.entities_id AS entities_id',
            'glpi_printers.is_global AS is_global',
            'glpi_manufacturers.name AS manufacturer'
         ],
         'FROM'      => 'glpi_printers',
         'LEFT JOIN' => [
            'glpi_manufacturers'  => [
               'FKEY'   => [
                  'glpi_printers'      => 'manufacturers_id',
                  'glpi_manufacturers' => 'id'
               ]
            ]
         ],
         'WHERE'     => [
            'glpi_printers.is_template'   => 0,
            'glpi_printers.id'            => $IDs
         ]
      ]);

      while ($printer = $iterator->next()) {
         //For each printer
         $this->replayDictionnaryOnOnePrinter($new_printers, $res_rule, $printer, $delete_ids);
      }

      //Delete printer if needed
      $this->putOldPrintersInTrash($delete_ids);
   }


   /**
    * @param $IDS array
   */
   function putOldPrintersInTrash($IDS = []) {

      $printer = new Printer();
      foreach ($IDS as $id) {
         $printer->delete(['id' => $id]);
      }
   }


   /**
    * Replay dictionnary on one printer
    *
    * @param &$new_printers   array containing new printers already computed
    * @param $res_rule        array of rule results
    * @param $params          array
    * @param &$printers_ids   array containing replay printer need to be put in trashbin
   **/
   function replayDictionnaryOnOnePrinter(array &$new_printers, array $res_rule,
                                          array $params, array &$printers_ids) {
      global $DB;

      $p['id']           = 0;
      $p['name']         = '';
      $p['manufacturer'] = '';
      $p['is_global']    = '';
      $p['entity']       = 0;
      foreach ($params as $key => $value) {
         $p[$key] = $value;
      }

      $input["name"]         = $p['name'];
      $input["manufacturer"] = $p['manufacturer'];

      if (empty($res_rule)) {
         $res_rule = $this->processAllRules($input, [], []);
      }

      $printer = new Printer();

      //Printer's name has changed
      if (isset($res_rule["name"])
          && ($res_rule["name"] != $p['name'])) {

         $manufacturer = "";

         if (isset($res_rule["manufacturer"])) {
            $manufacturer = Dropdown::getDropdownName("glpi_manufacturers",
                                                      $res_rule["manufacturer"]);
         } else {
            $manufacturer = $p['manufacturer'];
         }

         //New printer not already present in this entity
         if (!isset($new_printers[$p['entity']][$res_rule["name"]])) {
            // create new printer or restore it from trashbin
            $new_printer_id = $printer->addOrRestoreFromTrash($res_rule["name"], $manufacturer,
                                                              $p['entity']);
            $new_printers[$p['entity']][$res_rule["name"]] = $new_printer_id;
         } else {
            $new_printer_id = $new_printers[$p['entity']][$res_rule["name"]];
         }

         // Move direct connections
         $this->moveDirectConnections($p['id'], $new_printer_id);

      } else {
         $new_printer_id  = $p['id'];
         $res_rule["id"]  = $p['id'];

         if (isset($res_rule["manufacturer"])) {
            if ($res_rule["manufacturer"] != '') {
               $res_rule["manufacturers_id"] = $res_rule["manufacturer"];
            }
            unset($res_rule["manufacturer"]);
         }
         $printer->update($res_rule);
      }

      // Add to printer to deleted list
      if ($new_printer_id != $p['id']) {
         $printers_ids[] = $p['id'];
      }

   }


   /**
    * Move direct connections from old printer to the new one
    *
    * @param $ID                 the old printer's id
    * @param $new_printers_id    the new printer's id
    *
    * @return nothing
   **/
   function moveDirectConnections($ID, $new_printers_id) {
      global $DB;

      $computeritem = new Computer_Item();
      //For each direct connection of this printer
      $connections = getAllDataFromTable(
         'glpi_computers_items', [
            'itemtype'  => 'Printer',
            'items_id'  => $ID
         ]
      );
      foreach ($connections as $connection) {

         //Direct connection exists in the target printer ?
         if (!countElementsInTable("glpi_computers_items",
                                   ['itemtype'     => 'Printer',
                                    'items_id'     => $new_printers_id,
                                    'computers_id' => $connection["computers_id"]])) {
            //Direct connection doesn't exists in the target printer : move it
            $computeritem->update(['id'       => $connection['id'],
                                        'items_id' => $new_printers_id]);
         } else {
            //Direct connection already exists in the target printer : delete it
            $computeritem->delete($connection);
         }
      }
   }

}
